Tempebature-regtjlatok



V. F. DAVIS.

TEMPERATURE REGULATOR.

APPLICATION FILED SEPT. 23. 1915.

2 SHEETS-SHEET I.

Patented Aug. 8, 1916.

V. F. DAVS.

TEMPERATURE REGULATOR.

APPLICATION FILED SEPT. 23. 19! 5.

Patented Aug. 8, 1916.

2 SHEETS SHEET Z.

ASHANCV'DN. p. c.

rren en re rritur rrrong VERNER F. DAVIS, OF OBANGE, NEW JERSEY.

TEMPEBATURE-BEGULATOB.

Application filed September 23, 1915.

, tion.

This invention relates to an improved regulator which is usually used inconjunction with a fluid-pressure motor for controlling a heating unit,such use, for instance, being such as would be required in controllingthe valve of a radiator.

While the invention is adapted for many different situations andrequirements, its use and operation in connection with a radiator willbe set torth in this specification to fully describe and make plain itsConstruction and operation.

The regulator is operated in one direction by a yielding means such as aspring, and in the other direction by an element that changes itsdimension according to temperature, the regulator acting either to admita fluid under pressure to a fluid motor such as a diaphragm valve, or toshut off such fluid and permit the escape of such fluid as is in thefluid pressure motor.

The use of these regulators in such systems is well known to thoseskilled in the art, the invention in this case residing in a regulatorwhich has an adjusting means for regulating the point or temperature atwhich the valve is to operate, such adjusting means being simple andeasily operated.

The valve is further designed to operate under various pressures offluid used in Operating the motor, so that under a lower pressurecertain valves in a system of valves will operate, but under a higherpressure all the valves in the system will operate. This permits theregulated heating' o' some rooms in a building while other rooms are notheated, thus economizing in fuel. The valve is provided with anaccessible and easily operated manual latch for changing the Valve fromone operable by a low pressure of fluid to one operated by a higherpressure and vice versa.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a face View of my improved regulator, and Fig. 2 is asimilar View with the cover removed. Fig. 3 is a side view of theregulator shown in Fig. 2 with the real' Specification of LettersPatent.

Patcnted An 8, 1916.

Serial No. 52,150.

of its casing shown in section. Fig. t is a horizontal section on line4-1 in Fig. 2. Fig. 5 is a vertical section taken on line 5-5 in Fig. 2,but showing the thermostatic strip in elevation. Fig. 6 is a section online 6-6 in Fig. 2. Fig. 7 is a detail view of one form of latch forvarying the pressure at which the regulator will operate, this viewshowing the parts unlatched. Fig. 8 is a similar view but showing theparts latched. Fig. 9 shows a side and front of the lever of the primaryvalve, and Fig. 10 shows a side and front of i the lever of thesecondary valve.

The regulators can be of many different forms and designs, but as theyare usually placed on the walls oi' roons a hacking 10 is used as acasing, the backing being fastened to the wall and having a suitablecover ll thereon, which cover is usually perforated as at 12 so that thetemperature in the casing is the same as the room temperature. The covercan also be provided with a thermometer 13.

The regulator is usually secured in a vertical positiom its body portion14 being suitably fastened in the casing and having a chamber 15therein, which chamber has an inlet pipe opening 52 which is connectedto a source of fluid under pressure, usually compressed air. Thechainber lhas two valves controlling the passage of air under pressurefrom said chambcr. These valves are the primary valve 16 and thesecondary valve 17. The primary valve has a stern 18 which passesloosely through the parts 19 and 20 and hasits valve part arranged inthe passage 21 and adapted to close either ot' these parts, according tothe movement ot' the valve. The passage 21 extends upward to thediaphragm chamber 22, in which is a diaphragm 23 which is connected by astem 24 to the secondary lever 25. The outer end of the stem 18 of theprimar-y valve rests against the end of the primar-y lever 26, which ispivoted at 27 to the lugs 28 of the body portion 14:. The stud 29 of theboss 30 of the level-'26 engages the upper end of the slot 31 of thethermostatc strip 32, which is sutably fastened at the bottom. One formof fastening is shown in the draw ing, this form being adjustable andconsisting of an arm 33 which is adapted to rock on a pin 34 and has theend of the thermostatic strip 32 fastened to it. The arm 33 is engagedby a collar 35 of a screw 36, the screw being in engagement With thescrev-threaded opening 37 in the body portion. The rod or screw 36 has adial 38 thereon which has suitable mai-kinge or legends 39 which aresuccessively placed in rear of an opening 40 in the cover to indi- Catethe relative adjustments of the ther- Inostatic strip. A handle 41provides the turning of the rod 36. The lever 26 and the thernostaticstrip are kept in position by a spring 42 which bears against the headof the post 43 which passes through the hole 44 in the lever.

The secondary valve lever 25 is pivoted as to the lugs and bears at itslower end against the stem 46 of the secondary valve 17, the stempassing loosely through the ports 47 and 48 and sliding in the chamber49 to alternately close the ports 47 and 48. Both valves 16 and 17 areprcssed by light springs 50 which Xert just enough force to hold thestems of their valves against the valve Operating levers.

The chainber 49 is connected by a duct 51 to the pipe connection 53which is connected by suitable piping to a fluid pressure motor such asa diaphragm or similar valve. The secondary valve lever 25 is yieldinglypressed outward by a spring to collapsc the diaphragm 23 when thepressure behind the diaphragm is removed.

The secondary lever 25 has mounted thereon a latch 55 which is pivotedas at 56 and is pressed outward by a spring 57 which passes freelythrough the hole 58 in the lever 25. The latch 55 has its lower end 59beveled so that when the button 60 is pushed, the end 59 catches overthe nose 61 of the finger 62 and is locked thereto as the spring 63holds the finger in place. When so latched, the spring 57 adds itsinfluence to that of the spring 54 to hold the lever 25 against theaction of the diaphragm 23. The latch 55 is released by pressing thebutton 64 to permit the nose 61 to swing out of the path of the end 59of the latch. v

The operation of the device is as follows: Assuning that the latch 55 isin the position shown in Figs. 3, 6 and 8, that is, latched, and thatthe chamber 15 is supplied through the pipe connection 52 withcompressed air, at say twenty pounds pressure, if the temperature of theroom rises above a predetermined point, the thernostatic strip 32expands and permits the primary lever 26 to be pushed by the spring 42,and its end pushes the stem 18 of the valve 16 so -as to shut the port19 and open the port 20. This allows air in the diaphragm chamber andthe passage 21 to be vented through the port 20. The springs 54 and 57push the lever 25 to compress the diaphragni and also to allow the valvestem 46 and the valve 17 to be moved by its spring 50. This closes theport 47 and opens port 48, allowing compressed air to pass from 15 to 51and thus through pipe openings 53 to pipe connections to the radiatorvalve, and the valve through its fluid pressure motor is forced shut andthe heat is shut oli. When the air cools and the thermostatic stripshortens, the lever 26 is pulled out against the spring 42, the valvesteni 18 is allowed to be pushed out by its spring 50, and compressedair 'fromthe chaniber 15 passes through port 19 to the passage 21 andthus to the diaphragm chamber 22. upper end of the secondary valve lever25 are thus forced outward and the lower end of the lever inward to movethe. valve 17 to close port 48 and open port 47 to vent the fluidpressure motor and thus allow it to move to open the radiator valvei Thead- The diaphragm 23 and the' justment of the strip 32 governs the pointi of operation of the primary valve and the adjustnent is made by simplyturning the handle 41 to either lengthen or Shorten the strip 32.

lVhen the regulator is to operate at a lower pressure, the latch 55 isreleased and this also releases the spring 57 so that the spring 54alone presses the secondary lever 25 against the influence of thediaphragm. The utility of this latch is in the possibility of economy offuel and in the positive operi ation of the latch. For instance, in ahotel, school or similar structure, the pressure of the compressed airis lowered at night, to say fiftecn pounds, and the buttons 60 in thoserooms that are not to be heated are pressed, then the diaphragms of theregulators in those rooms will not be operated against the combinedpressures of springs 54 and 57. In guests rooms Who desire no heat, orin vacant rooms, this result can be accomplished, but those rooms with,unlatched regulators still have their heat 'regulated by the diaphragmsOperating at' fit teen pounds, since only the springs 54 in theseregulators are active.

constantly frequented parts of a building. In the morning when theengineer, janitor or other employee of the building turns on theincreased or day pressure' of compressed air, say twenty pounds, thispressure operates all regulators whether latched or unlatched, as theincreased pressure overcomes the resistance of the additional spring 57applied to secondary levers when the latches are latched. t

It Will be evident that many changes in details, arrangements andproportions of parts, and operation of the several devices,

This, for instance, in rooms used n night school and in can be madewithout departing from the scope of the invention as set forth in the appended claims.

Having thus described my invention, I claim: I

1. A regulator comprising a structure having a valved passage forconducting fluid under pressure, thermostatic means for controlling thepassage of air under pressure through the passage, means operated in onedirection by air when admitted to the passage, yielding means, as aspring, for opposing the air-operated means, and a spring latch adaptedto be placed in and out of operative contact With the air-operated meansso as to assist the spring when in operative contact.

2. A regulator comprising a lever, a diaphragm for Operating the leverin one direction, thermostatic means for controlling the operation ofthe diaphragm, a spring opposing the diaphragm, an additional springhaving no influence on the lever when released, and means on the leverfor engaging the spring to make it operative on said lever so as toassist the first spring.

3. A regulator comprising a lever, a diaphragm for Operating the leverin one direction, thermostatic means for controlling the operation ofthe diaphragm, a spring opposing the diaphragm, an additio-nal springhaving no influence on the lever when released, a latch on the lever andbearing on the additonal spring, and a holding and releasing means forthe latch so that when the latch is held, the additional spring assiststhe first spring in opposing the action of the diaphragm.

4. A regulator comprising a lever, a diaphragm Operating the lever,thermostatic means for controlling the operation of the diaphragm, aspring for Operating the lever latch, and a holding and releasing meansfor the latch.

5. A regulator conprising a lever, a diaphragm Operating the lever,thermostatic means for controlling the operation of the diaphragm, aspring for Operating the lever against the pressure from the diaphragn,an additional spring adjacent the lever, a latch swinging on the leverand in engagement with the additional spring, a button on the latch, aswinging finger having a nose thereon for engaging the latch, and aspring for swinging the arm to its looking position.

G. A regulator comprising a body portion, a swinging arm with a curvedface to which a thermostatic strip is adapted to be attached, a screwpassing through the arm and into the body portion beyond said arin` acollar on the screw to engage the arm, the collar acting on the arm inopposition to the tension of the strip, a handle on the screw, and anindicator on the screw, the handle and the indicator being on the outeredge of the screw, the arm being placed between the handle and the bodyportion, the arm engaging the screw between the handle and the bodyportion.

In testimony that I claim the foregoing, I have hereto set my hand, this3lst day of August, 1915.

VERNER F. DAVIS.

copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D. C.

